Tooth whitening is a cosmetic dental procedure aimed at lightening the color of teeth. It can be achieved through various methods, including over-the-counter products like whitening toothpaste and strips, as well as professional treatments performed by dentists. The process typically involves the use of bleaching agents, such as hydrogen peroxide or carbamide peroxide, which help remove stains and discoloration. The effectiveness of tooth whitening can vary based on the type of stains, the method used, and individual factors like tooth sensitivity. While many people experience positive results, it is essential to consult with a dentist to determine the best approach for achieving a brighter smile safely.